Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fb3c4c531b2b99…

MALICIOUS

PDF

45.1 KB Created: 2020-10-01 10:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-19
MD5: d82289d76b67b722627ff1dc8f06b0a5 SHA-1: bb4334cd11b228a26cc1cbb35336015807b79f16 SHA-256: 26fb3c4c531b2b99c3dd52c793339789ea014b2d9332990a4cf7306f5cf7c82c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?keyword=lymphatic+system+worksheet+pdf In PDF document text
    • http://xojifewax.precisionexteriorwash.com/uploads/1/3/0/7/130775192/nebojetoja.pdfIn PDF document text
    • http://files.pebbleaustralia.com/uploads/1/3/2/7/132710715/wokulojab_dofivoko.pdfIn PDF document text
    • http://files.brinccborneo.org/uploads/1/3/2/6/132681450/70c8efe.pdfIn PDF document text
    • http://sekajebef.7220mercantile.com/uploads/1/3/0/7/130739377/mofimateki.pdfIn PDF document text
    • http://files.tonyquattroville.com.au/uploads/1/3/0/7/130776611/likugosatelimopikar.pdfIn PDF document text
    • https://site-1037073.mozfiles.com/files/1037073/98539422448.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/77813318027.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/55798166370.pdfIn PDF document text
    • https://site-1040299.mozfiles.com/files/1040299/kumibomiwowenenadasifo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000718c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000718c.bin)
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57308776079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/8978/9853/files/remuxogiwikipegadiwoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6131/2676/files/marksheet_of_class_10_cbse_2018_topper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5467/3569/files/13825723508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0172/4580/files/vogubovikalugunobogolapak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4831/9638/files/idle_breakout_savecode.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000718c.bin)

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000718c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x718C 5564 bytes
SHA-256: bc9f1f3aa8d1d1bd2b8d751440b59879137e9b9c9d3bf511f11c717b3734f338
font_01_sfnt_off00008467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8467 10300 bytes
SHA-256: 48c497acfa7e6c744917a0b167db64912c2c750e0d9f158b6d904d773c8c4c72

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